The central duct parallels with trachea.
气管和中央腺管并行。
The contamination in the central air conditioning duct system is the one of the principal contamination of the indoor air, it include inhalable particle and microorganism.
中央空调通风系统送风中的污染物是室内空气的主要污染源之一，主要的污染物是可吸入颗粒物和微生物。
In this paper we designed a robot for central air conditioning duct cleaning on the basis of features of central air conditioning in China.
针对目前国内中央空调特点，设计了一种专门用于中央空调管道清扫的机器人。
In duct unit for larger central HVAC systems. Ideal for office buildings, hospitals, schools, restaurants, nursing homes, childcare facilities, food packaging or handling facilities, etc.
中央空调管道系统。办公大楼、医院、学校、餐馆、疗养院、托儿设施、污水处理厂、泵站和食品包装等。
Two other cables from the receiving equipment drop in trunking in the central service duct of the tower block and then continue underground in 25 mm polythene conduit.
另外两个电缆从在大楼中央服务管中继接收设备，然后继续下跌地下25毫米聚乙烯管道。
Designs, manufactures and assembles complete set of central air conditioning unit and its related products like ventilator, air duct and others, and contracts to turnkey projects.
设计、生产、安装全套中央空调设备及通风、复合管道等相关产品，承揽中央空调“交钥匙”工程。
Designs, manufactures and assembles complete set of central air conditioning unit and its related products like ventilator, air duct and others, and contracts to turnkey projects.
设计、生产、安装全套中央空调设备及通风、复合管道等相关产品，承揽中央空调“交钥匙”工程。
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